Dynamic controllability strategy of reactive-extractive dividing wall column for the separation of water-containing ternary azeotropic mixture
Dynamic controllability strategy of reactive-extractive dividing wall column for the separation of water-containing ternary azeotropic mixture
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反应-萃取间壁塔分离含水三元共沸混合物的动态可控策略
DOI：
10.1016/j.seppur.2022.122338
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发表时间：
2022-10
影响因子：
8.6
通讯作者：
Lanyi Sun
中科院分区：
文献类型：
--
作者：
Jiyan Liu;Guanghao Wan;Mengru Dong;Jie Kong;Yang Wu;Shumeng Han;Lanyi Sun
反应萃取隔壁塔(REDWC)将传统的反应精馏、萃取精馏和隔壁塔有机地结合在一起，是一个物理空间紧凑、变量间关联性强、高度集成的过程。设计REDWC过程的鲁棒控制策略是一项具有挑战性的工作。然而，没有关于REDWC控制的调查报告。在本研究中，通过分析稳态过程的开环可控性指标，构建了基本控制结构CS1。随后，在CS1上进一步建立了四种比例积分控制方案：比例控制结构(CS2)、内部组成控制结构(CS3)、前馈控制结构(CS4)和带前馈回路的三点温度控制结构(CS5)。动态性能测试是在进料流量和进料组成扰动分别为10%±10%和10%的情况下进行的。定性研究表明，在不使用昂贵的复合控制器的情况下，CS5在建立时间、稳态偏差和超调方面提供了最好的动态性能。以积分绝对误差(IAE)为评价标准，定量地证明了CS5具有最好的鲁棒性，应该是首选的控制方案。另一项关键发现表明，在REDWC中，蒸汽分流比和反应物的化学计量比是保证产品质量的两个关键自由度。这项工作的主要贡献是为REDWC乃至更复杂的精馏过程的控制提供有意义的参考。
The reactive-extractive dividing wall column (REDWC), which combines conventional reactive distillation, extractive distillation, and dividing wall column, is a highly integrated process with a compact physical space and strong interrelations between variables. It is challenging to design robust control strategies for the REDWC process. However, there are no investigations reported on the control of REDWC. In this study, through analyzing open-loop controllability indicators of the steady-state process, the basic control structure (CS1) is constructed. Subsequently, four proportional-integral control schemes are further established on the CS1: the proportional control structure (CS2), the internal composition control structure (CS3), the feedforward control structure (CS4), and the three-point temperature control structure (CS5) with feedforward loops. The dynamic performance tests are conducted with ± 10 % feed flow rate and ± 10 % feed composition disturbances. The qualitative research demonstrates that the CS5 offers the best dynamic performance in terms of settling time, steady-state deviations, and overshoots without the use of expensive composition controllers. With the integral absolute error (IAE) as an evaluation criterion, it is quantitatively demonstrated that the CS5 has the best robustness and should be the preferred control scheme. Another key finding shows that the vapor split ratio and the stoichiometric ratio of the reactants are two crucial degrees of freedom to guarantee product quality in the REDWC. The major contributions of this work are to provide a meaningful reference for the control of the REDWC and even more complicated distillation.
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影响因子：
4.2
作者：
Haoxiang Zhang;Qing Ye;Jiwei Qin;Hong Xu;Ning Li
通讯作者：
Haoxiang Zhang;Qing Ye;Jiwei Qin;Hong Xu;Ning Li
三塔变压精馏分离乙腈/甲醇/苯三元共沸物
影响因子：
8.6
作者：
Dongfang Xu;Xingzhen Liu;Zhen Zhang;Yinglong Wang
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Yinglong Wang
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影响因子：
4.2
作者：
Xiaolong Ge;Xinchuang Yang;Yicheng Yang;Yu Pan;Botan Liu;Botong Liu
通讯作者：
Botong Liu
影响因子：
11.1
作者：
Alexandra Elena Plesu Popescu;José Lluis Pellin;J. Bonet;J. Llorens
通讯作者：
Alexandra Elena Plesu Popescu;José Lluis Pellin;J. Bonet;J. Llorens
基于温差的萃取间壁塔比例积分控制与模型预测控制
影响因子：
4.2
作者：
Feng Zemin;Shen Weifeng;Rangaiah G P;Dong Lichun
通讯作者：
Dong Lichun